K. Ishimaru et T. Kojima, Stereoselective synthesis of trans-2,6-diaryl-4-piperidones by using benzaldiminetricarbonylchromium derivatives, J CHEM S P1, (13), 2000, pp. 2105-2108
Stereoselective synthesis of trans-2,6-diaryl-4-piperidones has been carrie
d out by cycloaddition of benzaldiminetricarbonylchromium derivatives 1 wit
h 2-silyloxybuta-1,3-diene in the presence of trimethylsilyl triflate as a
Lewis acid. The tricarbonylchromium moiety played an important role in incr
easing the stereoselectivities of the products.